1 //===--- CSKYToolchain.cpp - CSKY ToolChain Implementations ---*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "CSKYToolChain.h" 10 #include "CommonArgs.h" 11 #include "clang/Driver/Compilation.h" 12 #include "clang/Driver/InputInfo.h" 13 #include "clang/Driver/Options.h" 14 #include "llvm/Option/ArgList.h" 15 #include "llvm/Support/FileSystem.h" 16 #include "llvm/Support/Path.h" 17 #include "llvm/Support/raw_ostream.h" 18 19 using namespace clang::driver; 20 using namespace clang::driver::toolchains; 21 using namespace clang::driver::tools; 22 using namespace clang; 23 using namespace llvm::opt; 24 25 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs, 26 const Multilib &Multilib, 27 StringRef InstallPath, 28 ToolChain::path_list &Paths) { 29 if (const auto &PathsCallback = Multilibs.filePathsCallback()) 30 for (const auto &Path : PathsCallback(Multilib)) 31 addPathIfExists(D, InstallPath + Path, Paths); 32 } 33 34 /// CSKY Toolchain 35 CSKYToolChain::CSKYToolChain(const Driver &D, const llvm::Triple &Triple, 36 const ArgList &Args) 37 : Generic_ELF(D, Triple, Args) { 38 GCCInstallation.init(Triple, Args); 39 if (GCCInstallation.isValid()) { 40 Multilibs = GCCInstallation.getMultilibs(); 41 SelectedMultilibs.assign({GCCInstallation.getMultilib()}); 42 path_list &Paths = getFilePaths(); 43 // Add toolchain/multilib specific file paths. 44 addMultilibsFilePaths(D, Multilibs, SelectedMultilibs.back(), 45 GCCInstallation.getInstallPath(), Paths); 46 getFilePaths().push_back(GCCInstallation.getInstallPath().str() + 47 SelectedMultilibs.back().osSuffix()); 48 ToolChain::path_list &PPaths = getProgramPaths(); 49 // Multilib cross-compiler GCC installations put ld in a triple-prefixed 50 // directory off of the parent of the GCC installation. 51 PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" + 52 GCCInstallation.getTriple().str() + "/bin") 53 .str()); 54 PPaths.push_back((GCCInstallation.getParentLibPath() + "/../bin").str()); 55 getFilePaths().push_back(computeSysRoot() + "/lib" + 56 SelectedMultilibs.back().osSuffix()); 57 } else { 58 getProgramPaths().push_back(D.Dir); 59 getFilePaths().push_back(computeSysRoot() + "/lib"); 60 } 61 } 62 63 Tool *CSKYToolChain::buildLinker() const { 64 return new tools::CSKY::Linker(*this); 65 } 66 67 ToolChain::RuntimeLibType CSKYToolChain::GetDefaultRuntimeLibType() const { 68 return GCCInstallation.isValid() ? ToolChain::RLT_Libgcc 69 : ToolChain::RLT_CompilerRT; 70 } 71 72 ToolChain::UnwindLibType 73 CSKYToolChain::GetUnwindLibType(const llvm::opt::ArgList &Args) const { 74 return ToolChain::UNW_None; 75 } 76 77 void CSKYToolChain::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs, 78 llvm::opt::ArgStringList &CC1Args, 79 Action::OffloadKind) const { 80 CC1Args.push_back("-nostdsysteminc"); 81 } 82 83 void CSKYToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 84 ArgStringList &CC1Args) const { 85 if (DriverArgs.hasArg(options::OPT_nostdinc)) 86 return; 87 88 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) { 89 SmallString<128> Dir(computeSysRoot()); 90 llvm::sys::path::append(Dir, "include"); 91 addSystemInclude(DriverArgs, CC1Args, Dir.str()); 92 SmallString<128> Dir2(computeSysRoot()); 93 llvm::sys::path::append(Dir2, "sys-include"); 94 addSystemInclude(DriverArgs, CC1Args, Dir2.str()); 95 } 96 } 97 98 void CSKYToolChain::addLibStdCxxIncludePaths( 99 const llvm::opt::ArgList &DriverArgs, 100 llvm::opt::ArgStringList &CC1Args) const { 101 const GCCVersion &Version = GCCInstallation.getVersion(); 102 StringRef TripleStr = GCCInstallation.getTriple().str(); 103 const Multilib &Multilib = GCCInstallation.getMultilib(); 104 addLibStdCXXIncludePaths(computeSysRoot() + "/include/c++/" + Version.Text, 105 TripleStr, Multilib.includeSuffix(), DriverArgs, 106 CC1Args); 107 } 108 109 std::string CSKYToolChain::computeSysRoot() const { 110 if (!getDriver().SysRoot.empty()) 111 return getDriver().SysRoot; 112 113 SmallString<128> SysRootDir; 114 if (GCCInstallation.isValid()) { 115 StringRef LibDir = GCCInstallation.getParentLibPath(); 116 StringRef TripleStr = GCCInstallation.getTriple().str(); 117 llvm::sys::path::append(SysRootDir, LibDir, "..", TripleStr); 118 } else { 119 // Use the triple as provided to the driver. Unlike the parsed triple 120 // this has not been normalized to always contain every field. 121 llvm::sys::path::append(SysRootDir, getDriver().Dir, "..", 122 getDriver().getTargetTriple()); 123 } 124 125 if (!llvm::sys::fs::exists(SysRootDir)) 126 return std::string(); 127 128 return std::string(SysRootDir); 129 } 130 131 void CSKY::Linker::ConstructJob(Compilation &C, const JobAction &JA, 132 const InputInfo &Output, 133 const InputInfoList &Inputs, 134 const ArgList &Args, 135 const char *LinkingOutput) const { 136 const ToolChain &ToolChain = getToolChain(); 137 const Driver &D = ToolChain.getDriver(); 138 ArgStringList CmdArgs; 139 140 if (!D.SysRoot.empty()) 141 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot)); 142 143 CmdArgs.push_back("-m"); 144 CmdArgs.push_back("cskyelf"); 145 146 std::string Linker = getToolChain().GetLinkerPath(); 147 148 bool WantCRTs = 149 !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles); 150 151 const char *crtbegin, *crtend; 152 auto RuntimeLib = ToolChain.GetRuntimeLibType(Args); 153 if (RuntimeLib == ToolChain::RLT_Libgcc) { 154 crtbegin = "crtbegin.o"; 155 crtend = "crtend.o"; 156 } else { 157 assert(RuntimeLib == ToolChain::RLT_CompilerRT); 158 crtbegin = ToolChain.getCompilerRTArgString(Args, "crtbegin", 159 ToolChain::FT_Object); 160 crtend = 161 ToolChain.getCompilerRTArgString(Args, "crtend", ToolChain::FT_Object); 162 } 163 164 if (WantCRTs) { 165 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o"))); 166 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o"))); 167 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin))); 168 } 169 170 Args.AddAllArgs(CmdArgs, options::OPT_L); 171 ToolChain.AddFilePathLibArgs(Args, CmdArgs); 172 Args.addAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_s, 173 options::OPT_t, options::OPT_r}); 174 175 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); 176 177 // TODO: add C++ includes and libs if compiling C++. 178 179 if (!Args.hasArg(options::OPT_nostdlib) && 180 !Args.hasArg(options::OPT_nodefaultlibs)) { 181 if (ToolChain.ShouldLinkCXXStdlib(Args)) 182 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); 183 CmdArgs.push_back("--start-group"); 184 CmdArgs.push_back("-lc"); 185 if (Args.hasArg(options::OPT_msim)) 186 CmdArgs.push_back("-lsemi"); 187 else 188 CmdArgs.push_back("-lnosys"); 189 CmdArgs.push_back("--end-group"); 190 AddRunTimeLibs(ToolChain, ToolChain.getDriver(), CmdArgs, Args); 191 } 192 193 if (WantCRTs) { 194 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend))); 195 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o"))); 196 } 197 198 CmdArgs.push_back("-o"); 199 CmdArgs.push_back(Output.getFilename()); 200 C.addCommand(std::make_unique<Command>( 201 JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker), 202 CmdArgs, Inputs, Output)); 203 } 204 // CSKY tools end. 205